Tire-rim tool



March 1, 1932- v. BARROWS ET AL 1,847,164

TIRE RIM TOOL Filed May 18, 1929 3 Sheets-Sheet l N INVENTOR Vil /7 ,azn oxms 41d fied 0/7015/7 7%? ATTORNEY March 1, 1932. v. BARROWS ET AL TIRE RIM TOOL Filed May 18, 1929 s Sheets-Sheet 2 Zwir ATTORNEY Patented Mar. 1, 1932 UNITED STATES VERN BARROWS AND ram) 1). MARSH, or nocnns'rnnivnw YORK TIRE-RIM TOOL Application filed May 18, 1929. Serial No. 364,269.

The present invention relates to tire-rim tools, this application being a continuation in part of an application filed by us February 24, 1927, Serial No. 170,700. An object of the invention is to provide a tire-rim tool operatable by fluid pressure to open or close a split rim. Another object of the invention is to provide a fluid operated tire-rim tool which may be readily adjusted to operate on rims of diflerent diameters. A further object of the invention is to provide a fluid operated tire-rim tool which will be durable in construction, inexpensive to manufacture, and simple in operation. A still further object of the invention is to provide for effecting the adjustment of the tool for different sized rims by means of fluid pressure. Still another and further object of the invention is to provide means for adapting the machine for supporting solid rims thereon;

Tothese and other ends, the invention consists of certain parts and combinations of parts all of'which will be hereinafter described: the novel features being pointed out in the appended claims.

In the drawings:

Fig. 1 is a view in elevation of a machine embodying the present invention;

Fig. 2 is a plan view of the same machine;

Fig. 3 is an enlarged section on the line 33, Fig. 2; V

Fig. 4: is a vertical section through the machine illustrated in Fig. 1;

Fig. 5 is a section through the valve for controlling the fluid;

Fig.6 is a bottom view of the valve;

Figs. 7 and 8 are two fragmentary views showing the manner in which a stationary and the movable jaw engage a rim in expanding or closing the same;

Figs. 9 and 10 are two views showing th manner in which a stationary and'the mov able jaw engage a rim in contracting or opening the same;

Fig. 11 is a fragmentaryview showing the movable jaw equipped with an attachment for operating upon another type of rim; 7

Fig. 12 is 'a detail view showing one of the solid rim adapters attached to a jaw, and; j

to assume a position between the engaging Fig. 13 isa perspective view of one of the solid rim adapters. In the illustrated embodiment of the invention 1 indicates a standard or base on which a head 2 is bolted at 3. To this head is bolted at 4 a sleeve or collar 5: which, in this instance, is provided with'a split 6 from opposite sides of which lugs or ears 7 project, a bolt 8 passing through the ears and serving to expand and contract the sleeve or col-- ar 5. r

The collar 5 has jaws 9 and 10 pivotally connected thereto, the jaw 9. being pivoted on the bolt 8 and the jaw 10 being pivoted on the bolt 11. 7 Both of these jaws are free to swing in a limited arc to adjust themselves to the size of the rim. Supporting arms 12 may be provided for these jaws on the head 2 and may have horizontally projecting and curved guide ribs 13 for cooperating with the guideways 14: in the under sides of the jaws 9 and 10, lugs 15 being provided at opposite ends of the ribs 13 to limit the swinging movement of the jaws 9 and 10. Each of the jaws 9 and 10 have a pair of rim engaging devices 16 and 17 spaced apart at 18, the device 17 being on the inner side and in a higher plane than the device 16 in order to engage the inner face of a tire rim'19 as shown in Fig. 7, the device 16 being adapted to engage the outer face of the rim 19 adj acent one edge in order to contract or open the rim, as shown in Fig. 9. Beyond the portion 16 each jaw 9 and 10 has a rest portion 20 which through an inclined or beveled portion 21 connects with the rim engaging portion 16 so that the rim may ride upwardly on the portions 21 of the two arms portions, 16 and 17.

A third or movable jaw 22 is provided which, is preferably guided in a straight line radially of the rim being operated on. In this instance the movable jaw is supported by a supporting arm 23 which has longitudinally extending guiding means on which a guide portion 2 1 on the jaw 22 operates. The jaw 22 has two rim engaging portions 16 and 17 separated by a space 18 and engages the rim m 19 like similar parts on the jaws 9 and 10. Leading from the guide and supporting arm 23 the jaw is provided with an inclined surface 21 which when said aw 22 moves outwardly will direct a rim from the supporting arm 23 to the recess or space 18, the arm 23 acting as a rim and tire support like the parts 20 of the arms 9 and 10.

Fluid operated means is provided for etfecting relative movement between the jaw 22 and the jaws 9 andlO either for expanding or contracting the rim. This fluid operated means, in this instance, comprises a cylinder 24 arranged within the collar or sleeve 5 and adjustablyheld against movement by the collar or sleeve. lVithin the cylinder operates a piston 25 which by a stem or rod 26 connects with the movable jaw 22. The admission of air, or other fluid, alternately into opposite ends of the cylinder will shiftthe piston 25 in opposite directions and move the movable jaw 22 in opposite directions. The sleeve 5 permits the cylinder 24 to shift therein so that rims of diflerent diameters may be operated upon. The shifting of the cylinder in the split sleeve may be-accomplished automatically by placing a rim and tire on the three jaws, loosening the cylinder from the split ring or clamp and admitting air to the proper end of the cylinder.

From opposite ends of the cylinder lead two fluid conductors 27 and 28 which at 39 connect through passages 38 with chambers l 33 in avalve casing 7 both of said chambers connecting by passages 32 with a common inlet 29 for the fluid supply. In this way the fluid supply connects by two branches with the cylinder, on opposite sides of the piston. Also connecting with these two branches between the chambers 33 and the cylinder 24 are two exhaust ports 42 which lead from chambers 41 and connect the by-passages 40 with the two conductors 27 and 28 leading to opposite ends of the cylinder.

. The valve casing is formed of a main casting having the chambers 33 and 41 formed therein from one side and closed by two plates30 which are held to the main casting by bolts 30. The chambers 33 are arranged at opposite corners of the casing and the passage 32 leads thereto at points below the tops of the chambers from the inlet 29. From the top of each chamber 33 lead passageways 38 which connect with the fluid conductors 27 and 28. WVithin each chamber 33 is a cylindrica-lly formed valve member 34 having a stem 36 arising therefrom and projecting through the passageways 38 and through the top of the casing. Also in the casing is a valve seat 37 which surrounds the adjacent end of the passageways 38 and is engaged by the valve member to close the fluid supply to the conductor 27. Normally this valve member is held in closed position by a spring 35 and when closed lies so that the fluid may pass from the fluid supply chamber 33 or below the valve member and thereby hold the valve member to its seat under the pressure of the fluid supply. The chambers 41 lie in opposite corners of the casting and communicate with the exhaust port openings 42 at the top about the stems 45 of the cylindrical valve member 43 which operates in such chamber. About the adjacent end of the exhaust is a valve seat 43 against which the valve member 43 is normally held by a spring 44. The chambers 41 connect by passageways 4O relatively with the casing connections for the conductors 27 and 28, the passageways 40 connecting with the'chamber 41 below the valves 43 so as to utilize the pressure on the opposite sides of the piston 25 within the cylinder for holding the valves 43 to their seats. For the purpose of operating one sup ply controlling the flow of the fluid to one side of the piston 25 simultaneously with the operation of one exhaust valve controlling the exhaust of fluid from the opposite side of the piston, there are provided two operators 26, in this instance, in the form of treadles pivoted to the frame 1 and each engaging a stem 36 and a stem 45, one controlling the inlet of fluid to one side of the piston and the other controlling the exhaust from the other side of the piston.

It is apparent that with this'valve, as long as the fluid is being supplied to either side of the piston, the exhaust from the other side will be open but as soon as the supply of fluid is cut off the exhaust ceases and the tendency of the supplied fluid to expand is resisted by the remaining fluid on the other side of the piston so that the movement of the piston ceases immediately when the fluid supply is out 01f.

In expanding or contracting arim the cylinder 24 is first released fromthe split clamping ring 5 and the rim to be operated on is thrown upon the supporting portions 20 and the arm 22. Air is then admitted to the cylinder onone side and exhausted on the other side and the latter shifts in the sleeve 5 until the aws are properly positioned for the size of the rim. The air supply to the cylinder is now discontinued and the cylinder is fixedly clamped in the ring or sleeve 5. Air is again admitted to one side of the cylinder and exhausted from the other to expand or contract the rim as may be desired. The inclined surfaces 27 first move the rim to a position between the rim engaging portions 16 and 17 and if an expanding movement of the jaws has been effected, the portions 17 on the three jaws will engage the rim, but if a contracting movement of the jaws has been effected, the portions 16 on the jaws will engage the rim. Owing to the fact that the exhaust from the cylinder is simultaneously controlled with the intake, it is possible to control the movement of the piston exactitude, so that there is no tendency for the piston to move due to the expansion of the air after the air supply is cut oil and thus, distort the rim. The machine is controlled by the foot, thus, leaving both hands free for operation upon the tire and the rim while the jaws are moving into and out of engagement with the rim. The maximum power obtained by the machine enables it to readily operate on sprung or distorted rims as well as upon rusted rims. The elastic power obtained permits the rim to break or expand without requiring other tools or hammering which tend to distort the rim.

With the end in view of operating on rims of the type shown in Fig. 11 where the two portions of the rim 19 are connected by a link or lever 46 pivoted at 47 and 48 to the rim on opposite sides of the split 49 and having an operating portion 50 with a hole 51, the jaw 22 carries a hook 52 pivoted to one side thereof at 53 and having its hook portion extending upwardly to pass through the opening 51, so that when the jaw 22 is moved the hook will pull or push on the lever or link and the latter will be moved respectively toexpand or contract the rim.

Solid rims require to be supported in such a position that the tire may be pushed ofl the rim preferably in a downward direction, and to adapt the machine for use on solid rims, three jaw adapters 54 are provided each of which has a pocket 55 on its under side for receiving the portion 17 of one of the jaws 9, 10, and 22. These provide extensions on the portions 17 which will engage the rim 56 and hold the tire 57 in spaced relation to the portions 16, thus permitting the tire to be pressed downwardly off the rim 56.

What we claim as our invention and desire to secure by Letters Patent is:

1. In a tire-rim tool, a support, two jaws relatively adjustable on the support, a slidable jaw, and a motor for shifting the slidable jaw, adjustable on the support in a line parallel with the line of the slidable jaw to accommodate rims of diflerent diameters.

2. In a tire-rim tool, a support, two jaws relatively adjustable on the support, a motor adjustable in a straight line on the support between the two first mentioned jaws, and a third jaw operated by the motor from any adjusted position of the latter.

3. In a tire-rim tool, a plurality of jaws, one of which is shiftable relatively to another, a piston connected to said movable jaw, and a cylinder in which the piston moves, and means permitting the adjustment of the cylinder in the direction of the line of movement of the piston to vary the field of movement of the movable jaw.

4. In a tire-rim tool, the combination with a support, of a plurality of jaws mounted on the support, a cylinder adjustable on the support, a piston slidable in the cylinder and having one of the jaws connected thereto, to be moved relatively to the other jaws, a fluid supply pipe connected to the support, and flexible fluid conducting connections between the fluid supply pipe and the adjustable cylinder. 7

5. A split tire-rim opening and closing apparatus comprising a cylinder, a piston movable in the cylinder, a rim engaging member carried by the piston, two other rim engaging members mounted on the cylinder, means permitting the adjustment of the other two rim engaging members in the direction of the axis of the cylinder, and means for supplying a fluid to the cylinder on either side of the piston to effect movement of the piston in the cylinder in either direction.

6. A split tire-rim opening and closing apparatus comprising'a split sleeve, two rim engaging members carried by the sleeve, 2. cylinder adjustable in the sleeve, a piston movable in the cylinder, a rim engaging member carried by. the piston, and means for supplying a fluid to the cylinder on either side of the piston to effect movement of the piston in the cylinder in either direction. 7

7. A split tire-rim opening and closing apparatus comprising a cylinder, a reciprocatable piston movable in the cylinder, means for supplying a fluid to the cylinder on either side of the piston at will to effect the reciprocation of the piston in the cylinder in either direction, rim engaging means carried by the piston, rim engaging means carried by the cylinder, and means providing a sliding movement of one of said rim engaging means in the direction of the line of movement of thecpiston and relatively to the piston and the cylinder, said means having a device for holding said rim engaging means in its adjusted position.

8. A split tire-rim opening and closing apparatus comprising a cylinder, a piston movable in the cylinder, a sleeve, adjustable axially of the cylinder and clampable at difierent points along the same, rim engaging members carried by the sleeve and by the piston, and means for supplying a fluid to the cylinder on either side of the piston to effect movement of the piston in the cylinder in either direction.

9. A split tire-rim opening and closing apparatus comprising a cylinder, a piston movable in the cylinder, a sleeve adjustable axially of the cylinder and clampable at difler ent points along the same, two rim engaging members carried by the sleeve, a rim engaging member carried by the piston, and means for supplying a fluid to the cylinder on either side of the piston to effect movement of the piston in the cylinder in either direction.

VERN BARROWS. FRED D. MARSH. 

